AP Radio
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01-30-2024 06:49 AM
Hello,
Today one of my AP suddently reboot and after the AP come up i can see the SSID which only running under 802.11a is not detected. Before the AP suddenly reboot the SSID is showing and can be accessed. Now only client 802.11b can connect to this AP, and i believe something happened on 802.11a radio. The strange thing is on WLC side the 802.11a radio showing up, tryimg disable enable the radio, change the frequency, change the tx power wirh no help.
The AP model is 3502 and the WLC is 2204. Need some help from anybody here can or there are any way to make sure if the 802.11a for that AP have malfunction or something else by issuing some command, debug or queri the logs?
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01-30-2024 07:12 AM
- Reboot the AP (again) and just after boot connect to it and issue the command show logging ; look for errors related to radios or other , if any.
M.
-- Each morning when I wake up and look into the mirror I always say ' Why am I so brilliant ? '
When the mirror will then always repond to me with ' The only thing that exceeds your brilliance is your beauty! '
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01-30-2024 05:11 PM - edited 01-30-2024 06:41 PM
HI..
Here log from AP
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01-30-2024 12:31 PM
Can you share the complete AP boot log console output.
Also, from AP console
sh ip int brief
sh interfaces
Also, share AP and WLC code versions.
Jagan Chowdam
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01-30-2024 05:15 PM - edited 01-30-2024 06:42 PM
Hello,
sh ip int brief result
Interface IP-Address OK? Method Status Protocol
BVI1 10.100.16.246 YES DHCP up up
BVI2 unassigned YES unset up up
BVI3 unassigned YES unset up up
BVI4 unassigned YES unset up up
Dot11Radio0 unassigned NO unset up up
Dot11Radio0.1 unassigned YES unset up up
Dot11Radio0.2 unassigned YES unset up up
Dot11Radio0.4 unassigned YES unset up up
Dot11Radio0.5 unassigned YES unset up up
Dot11Radio0.18 unassigned YES unset up up
Dot11Radio0.19 unassigned YES unset up up
Dot11Radio0.20 unassigned YES unset up up
Dot11Radio1 unassigned NO unset up up
Dot11Radio1.1 unassigned YES unset up up
Dot11Radio1.2 unassigned YES unset up up
Dot11Radio1.3 unassigned YES unset up up
Dot11Radio1.4 unassigned YES unset up up
Dot11Radio1.5 unassigned YES unset up up
Dot11Radio1.18 unassigned YES unset up up
Dot11Radio1.19 unassigned YES unset up up
Dot11Radio1.20 unassigned YES unset up up
GigabitEthernet0 unassigned NO unset up up
GigabitEthernet0.116 unassigned YES unset up up
GigabitEthernet0.117 unassigned YES unset up up
GigabitEthernet0.118 unassigned YES unset up up
GigabitEthernet0.124 unassigned YES unset up up
GigabitEthernet0.131 unassigned YES unset up up
GigabitEthernet0.250 unassigned YES unset up up
NVI0 10.100.16.246 YES unset up up
WLC version = 8.5.182.0
AP version = 8.5.182.0
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01-31-2024 06:49 AM - edited 01-31-2024 06:56 AM
Dot11Radio1 is administratively down, line protocol is down
Check these:
1. Choose Wireless > 802.11a/n > Network
Make sure the 802.11a Network Status check box is enabled for the 802.11a band.
2. Wireless > Access Points > All APs then click on specific AP and make sure admin status is enable.
If this checked out, try WLC code upgrade to 8.5.182.11.
And you can also try factory reset the AP. To reset a 3502 AP, hold down the mode button for 30 seconds at power on.
Jagan Chowdam
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01-31-2024 06:12 AM
Did you mean the WLC is 2504 not 2204?
Latest code version is 8.5.182.11 https://software.cisco.com/download/specialrelease/2702eede2b47a5c3bb40795bbe836af6 so worth updating to ensure you have all available bug fixes.
But 3502 AP and 2504 WLC are both past end of support so Cisco stopped testing them years ago and no more bugs will be fixed.
When you want to see the complete log remember to use "term len 0" first so that you don't get the more prompt after every page.
If an AP reload did not solve the problem you could try doing factory default on the AP then reconfigure.
If that doesn't help then might be a problem on WLC - try deleting then reconfiguring the WLAN.
If that still doesn't work you could try a reboot of the WLC which you will need to do anyway if you upgrade to 8.5.182.11
Are other SSIDs working on 5GHz? Your log shows the radio resetting continuously so might be a faulty radio.
Please click Helpful if this post helped you and Select as Solution (drop down menu at top right of this reply) if this answered your query.
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TAC recommended codes for AireOS WLC's and TAC recommended codes for 9800 WLC's
Best Practices for AireOS WLC's, Best Practices for 9800 WLC's and Cisco Wireless compatibility matrix
Check your 9800 WLC config with Wireless Config Analyzer using "show tech wireless" output or "config paging disable" then "show run-config" output on AireOS and use Wireless Debug Analyzer to analyze your WLC client debugs
Field Notice: FN63942 APs and WLCs Fail to Create CAPWAP Connections Due to Certificate Expiration
Field Notice: FN72424 Later Versions of WiFi 6 APs Fail to Join WLC - Software Upgrade Required
Field Notice: FN72524 IOS APs stuck in downloading state after 4 Dec 2022 due to Certificate Expired
- Fixed in 8.10.196.0, latest 9800 releases, 8.5.182.12 (8.5.182.13 for 3504) and 8.5.182.109 (IRCM, 8.5.182.111 for 3504)
Field Notice: FN70479 AP Fails to Join or Joins with 1 Radio due to Country Mismatch, RMA needed
How to avoid boot loop due to corrupted image on Wave 2 and Catalyst 11ax Access Points (CSCvx32806)
Field Notice: FN74035 - Wave2 APs DFS May Not Detect Radar After Channel Availability Check Time
Leo's list of bugs affecting 2800/3800/4800/1560 APs
Default AP console baud rate from 17.12.x is 115200 - introduced by CSCwe88390
